INTERIM CONSOLIDATED STATEMENTS OF EQUITY - USD ($) shares in Thousands, $ in Thousands	Total	Series A Preferred Stock	Series B Preferred Stock	Total Stockholders' equity	Total Stockholders' equity Series A Preferred Stock	Total Stockholders' equity Series B Preferred Stock	Preferred Stock	Common stock	Additional paid-in capital	Accumulated other comprehensive income (loss)	Accumulated dividends in excess of earnings	Accumulated dividends in excess of earnings Series A Preferred Stock	Accumulated dividends in excess of earnings Series B Preferred Stock	Noncontrolling interests
Beginning balance (in shares) at Dec. 31, 2019							7,443	58,228
Beginning balance at Dec. 31, 2019	$ 1,444,451			$ 1,337,817			$ 407,435	$ 582	$ 1,330,444	$ (24,642)	$ (376,002)			$ 106,634
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net share activity through equity award plan (in shares)								(240)
Net share activity through equity award plan	(1,458)			(1,309)				$ 3	(1,312)					(149)
Increase (decrease) in fair value of derivative contracts	(36,715)			(33,155)						(33,155)				(3,560)
Foreign currency translation adjustments	(223)			(201)						(201)				(22)
Equity-based compensation expense	4,875			4,377					4,377					498
Proceeds net of fees from settlement of forward shares (in shares)								1,930
Proceeds net of fees from settlement of forward shares	83,217			78,535				$ 19	78,516					4,682
Dividends declared on Preferred Stock		$ (1,906)	$ (5,139)		$ (1,906)	$ (5,139)						$ (1,906)	$ (5,139)
Dividends declared to common stockholders	(28,393)			(28,393)							(28,393)
Dividends declared to noncontrolling interests	(3,133)			0										(3,133)
Net income	8,120			8,010							8,010			110
Ending balance (in shares) at Mar. 31, 2020							7,443	60,398
Ending balance at Mar. 31, 2020	1,463,696			1,358,636			$ 407,435	$ 604	1,412,025	(57,998)	(403,430)			105,060
Beginning balance (in shares) at Dec. 31, 2019							7,443	58,228
Beginning balance at Dec. 31, 2019	1,444,451			1,337,817			$ 407,435	$ 582	1,330,444	(24,642)	(376,002)			106,634
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Increase (decrease) in fair value of derivative contracts	(40,356)
Dividends declared on Preferred Stock	(14,090)
Net income	18,329
Ending balance (in shares) at Jun. 30, 2020							7,443	61,432
Ending balance at Jun. 30, 2020	1,486,936			1,381,200			$ 407,435	$ 614	1,463,445	(61,322)	(428,972)			105,736
Beginning balance (in shares) at Mar. 31, 2020							7,443	60,398
Beginning balance at Mar. 31, 2020	1,463,696			1,358,636			$ 407,435	$ 604	1,412,025	(57,998)	(403,430)			105,060
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net share activity through equity award plan (in shares)								(1)
Net share activity through equity award plan	(1,360)			(1,225)				$ 0	(1,225)					(135)
Increase (decrease) in fair value of derivative contracts	(3,641)			(3,382)						(3,382)				(259)
Foreign currency translation adjustments	64			58						58				6
Equity-based compensation expense	6,081			5,477					5,477					604
Proceeds net of fees from settlement of forward shares (in shares)								1,033
Proceeds net of fees from settlement of forward shares	50,455			47,178				$ 10	47,168					3,277
Dividends declared on Preferred Stock	(7,045)	(1,906)	(5,139)		(1,906)	(5,139)						(1,906)	(5,139)
Dividends declared to common stockholders	(28,389)			(28,389)							(28,389)
Dividends declared to noncontrolling interests	(3,134)			0										(3,134)
Net income	10,209			9,892							9,892			317
Ending balance (in shares) at Jun. 30, 2020							7,443	61,432
Ending balance at Jun. 30, 2020	1,486,936			1,381,200			$ 407,435	$ 614	1,463,445	(61,322)	(428,972)			105,736
Beginning balance (in shares) at Dec. 31, 2020							7,443	64,580
Beginning balance at Dec. 31, 2020	1,584,698			1,476,174			$ 407,435	$ 646	1,622,857	(50,451)	(504,313)			108,524
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net share activity through equity award plan (in shares)								(426)
Net share activity through equity award plan	59			54				$ 4	50					5
Conversion of Class A Partnership units to Class A common stock (in shares)								92
Conversion of Class A Partnership units to Class A common stock	0			2,041				$ 1	2,040					(2,041)
Increase (decrease) in fair value of derivative contracts	17,253			15,414						15,414				1,839
Foreign currency translation adjustments	(158)			(144)						(144)				(14)
Equity-based compensation expense	6,856			6,237					6,237					619
Proceeds net of fees from settlement of forward shares (in shares)								3,865
Proceeds net of fees from settlement of forward shares	215,846			203,164				$ 39	203,125					12,682
Dividends declared on Preferred Stock		(1,906)	(5,139)		(1,906)	(5,139)						(1,906)	(5,139)
Dividends declared to common stockholders	(32,512)			(32,512)							(32,512)
Dividends declared to noncontrolling interests	(3,235)			0										(3,235)
Net income	7,918			7,839							7,839			79
Ending balance (in shares) at Mar. 31, 2021							7,443	68,963
Ending balance at Mar. 31, 2021	1,789,680			1,671,222			$ 407,435	$ 690	1,834,309	(35,181)	(536,031)			118,458
Beginning balance (in shares) at Dec. 31, 2020							7,443	64,580
Beginning balance at Dec. 31, 2020	1,584,698			1,476,174			$ 407,435	$ 646	1,622,857	(50,451)	(504,313)			108,524
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Increase (decrease) in fair value of derivative contracts	21,398
Dividends declared on Preferred Stock	(14,090)
Net income	12,117
Ending balance (in shares) at Jun. 30, 2021							7,443	77,030
Ending balance at Jun. 30, 2021	2,248,813			2,106,843			$ 407,435	$ 770	2,305,032	(31,638)	(574,756)			141,970
Beginning balance (in shares) at Mar. 31, 2021							7,443	68,963
Beginning balance at Mar. 31, 2021	1,789,680			1,671,222			$ 407,435	$ 690	1,834,309	(35,181)	(536,031)			118,458
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net share activity through equity award plan (in shares)								(132)
Net share activity through equity award plan	(1,078)			(987)				$ (1)	(986)					(91)
Conversion of Class A Partnership units to Class A common stock (in shares)								26
Conversion of Class A Partnership units to Class A common stock	0			629					629					(629)
Increase (decrease) in fair value of derivative contracts	4,145			3,494						3,494				651
Foreign currency translation adjustments	54			49						49				5
Equity-based compensation expense	7,311			6,695					6,695					616
Proceeds net of fees from settlement of forward shares (in shares)								8,173
Proceeds net of fees from settlement of forward shares	490,897			464,466				$ 81	464,385					26,431
Dividends declared on Preferred Stock	(7,045)	$ (1,906)	$ (5,139)		$ (1,906)	$ (5,139)						$ (1,906)	$ (5,139)
Dividends declared to common stockholders	(36,130)			(36,130)							(36,130)
Dividends declared to noncontrolling interests	(3,220)			0										(3,220)
Net income	4,199			4,450							4,450			(251)
Ending balance (in shares) at Jun. 30, 2021							7,443	77,030
Ending balance at Jun. 30, 2021	$ 2,248,813			$ 2,106,843			$ 407,435	$ 770	$ 2,305,032	$ (31,638)	$ (574,756)			$ 141,970